Subject: [PATCH] Added :BindAddress to @options to set the IP Address to bind the server to. Added :ExternalAddress to @options to be able to test PASV support with a firewall. Added :Use220First to @options to have the server return a 220 response instead of a 200 response upon connection to fix compatibility with some FTP clients. Fixed an issue with the PORT command that prevented Active connections from working properly. Changed socket.accept in start() to be non-blocking so the server can be shut down cleaner.